yes, it can be longer than 3 months, i think about 90% of settlement visas are processed in that time.

from the british embassy website in manila

'If you are applying to settle in the UK, in most cases we are able to process your application within 13 weeks, however this may vary depending on where you are applying'

email them, if you do not get a reply then contact your mp,

really making a child wait,,

my stepson got his visa in a couple of weeks.